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Effect of Warm Rolling on the Structure and Tensile Properties of a Metastable Fe-Based Medium Entropy Alloy

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Abstract

The present study investigates the impact of warm rolling on the microstructure and tensile properties of Fe60(CoNi)30Cr10 Fe-based medium entropy alloy (Fe-MEA). Warm rolling is performed above room temperature but below the recrystallization temperature. The experimental procedures involve comparing the microstructure and mechanical properties of the warm-rolled specimen with a cold-rolled and subsequently annealed specimen. Microstructural analysis reveals coarse elongated face-centered cubic grains, deformation-induced martensite, and a high density of dislocations in the warm-rolled sample. Tensile tests conducted at ambient and cryogenic temperatures demonstrate that the warm-rolled Fe-MEA exhibits enhanced strength and a similar level of elongation compared to the annealed sample. The improved mechanical properties are attributed to the transformation-induced plasticity resulting from the high dislocation density by warm rolling. This study provides valuable insights into the potential of warm rolling as a processing technique to enhance the mechanical properties of Fe-MEA, offering possibilities for broader applications.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea

    Hyojin Park, Jungwan Lee, Sujung Son & Soung Yeoul Ahn

  2. Center for Heterogenic Metal Additive Manufacturing, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea

    Hyojin Park, Jungwan Lee, Rae Eon Kim, Sujung Son, Soung Yeoul Ahn & Hyoung Seop Kim

  3. Graduate Institute of Ferrous Technology, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea

    Rae Eon Kim & Hyoung Seop Kim

  4. Institute for Convergence Research and Education in Advanced Technology, Yonsei University, Seoul, 03722, Republic of Korea

    Hyoung Seop Kim

  5. Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai, 980-8577, Japan

    Hyoung Seop Kim

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HP: Conceptualization, methodology, investigation, writing–original draft, and writing–review and editing. JL: validation, formal analysis, and writing–review and editing. REK: conceptualization. SS: methodology. SYA: methodology. HSK: supervision, project administration, funding acquisition, and writing–review and editing.

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Park, H., Lee, J., Kim, R.E. et al. Effect of Warm Rolling on the Structure and Tensile Properties of a Metastable Fe-Based Medium Entropy Alloy. Met. Mater. Int. 30, 585–592 (2024). https://doi.org/10.1007/s12540-023-01532-5

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